heart

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Across
  1. 1. pulls oxygen into the lungs
  2. 4. which side of the heart is oxiginated
  3. 5. connects arteries to veins
  4. 7. gives the blood back to the heart
  5. 9. stops back flow in blood
Down
  1. 2. Creates blood clots
  2. 3. the heart is mostly made of this
  3. 6. upper chamber of the heart
  4. 8. pumps blood